Investigation of structural, optical, electrical, and magnetic properties of Fe‐doped La0.7Sr0.3MnO3 manganites

Hassan, Abdullah Ameen Saad; Khan, Wasi; Husain, Shahid; Dhiman, Pooja; Singh, M.

doi:10.1111/ijac.13540

Cited by 22 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have conducted FTIR measurements on our three materials and observed that atoms and molecules may create connections via several methods, including stretching, bending, and rocking. The picture shows that the stretching vibrations of Mn-O bonds are connected to the range of 690 to 710 cm -1 , whereas the bending modes of Mn-O bonds are related with the range of 465 to 480cm-1 (Hassan et al, 2020). This correlation is due to a change in the bond angle of Mn-O-Mn.…”

Section: Ftir Analysismentioning

confidence: 95%

See 1 more Smart Citation

Tuning of the Band Gap and Suppression of Metallic phase by Ca doping in La1-xCaxMnO3 Manganite Nano-particles

Ali,

Shah,

Khan

et al. 2024

Preprint

View full text Add to dashboard Cite

Polycrystalline compounds of lanthanum calcium manganite La1-xCaxMnO3, (LCMO) are extensively utilized in energy conversion systems because of their low losses and features related to the transfer of electric charges. This work aimed to examine the impact of different levels of Ca 2+ replacements (x = 0.1, 0.2, and 0.3) on the adjustment of the optical band gap and dielectric losses in La1-xCaxMnO3 nanoparticles. The synthesized samples underwent structural analysis using X-ray diffraction. All generated samples were proven to have an orthorhombic R 3 ̅ c crystal structure. The estimated crystallite size ranged from 25 nm to 32 nm, and other lattice characteristics were also determined. An agglomerated spherical form consisting of nanoparticles with a range of (33-46 nm) can be seen in the scanning electron micrographs of all of the LCMO samples. The nanoparticles had a moderate size distribution and were influenced by narrower grain boundaries. Energy-dispersive X-ray spectroscopy was utilized to verify the elemental makeup of each chemical, while the infrared spectrum revealed bonding in the fingerprint region. A considerable decrease in the optical band gap was detected through the analysis of UV spectrometer absorption data. The band gap exhibited a reduction from 3.95 eV to 3.74 eV. The decrease was determined to be associated with the disparity in refractive index, which was computed using both Moss and Herve-Vandamme equations. Simultaneously, frequency-dependent dielectric study indicated a direct correlation between frequency and the rise in Ca concentration, resulting in an inverse impact on dielectric loss. In addition, the electrical conductivity of these nano-system that were created design as the Ca content grew. This increase was represented by Johnscher's universal power law in the high frequency range.

show abstract

Section: Ftir Analysismentioning

confidence: 95%

“…The reduction of the band gap may be attributed to the quantum confinement effect of the samples. Equation-11 demonstrates the relationship between the average particle size (R) and the effective band gap (E*) of the particles (Hassan et al, 2020).…”

Section: Ftir Analysismentioning

confidence: 99%